Global reset

I want to give learners the opportunity to review the entire course if they fail the quiz. On the fail layer, I give give them the choice of clicking a button to take them back to the beginning of the course.

Is there any way to do a global reset for the entire course at one time. That is, to return everything (every variable reset to initial state, every button on every slide set to normal, instead of visited, etc.) in the course to it's initial state just as though the learner had exited the course and re-entered it.